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N o. 627,394. Patented lune 20, |899.

W. E. CBIST.

GATE VALVE.

(Application led Oct. 19, 1R98.) (No Model.) 2 Sheets-Sheet l.

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No. 627,394. Patented :une 2o, |899.A

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GATE VALVE.

(Application tiled Oct. 19, 1898.)

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llllllllllllb UNITED STATES PATENT EEICE.

IVIL'LIAM EDWARD ORIST, OF LYNOHBURG, VIRGINIA, ASSIGNOR TO THEGLAMORGAN PIPE AND FOUNDRY COMPANY, OF SAME PLACE.

GATE-VALVE.

SPEGIFICATIGN forming part of Letters Patent No. 627,394, dated June20,1899.

Application filed October 19, 1898. Serial No. 693,994. (No model.)

To all whom it may concern:

Be it known that l, WILLIAM EDWARD ORIsT, acitizen of the United States,residing at Lynchburg, in the county of Campbell and State of Virginia,have invented a new and useful Gate-Valve, of which the following is aspecification.

This invention relates to valves, and more particularly to that type ofvalves which are termed gate-valves and are used in water mains orpiping for carrying the fluid under a strong head or pressure.

The invention'has for its primary object a general improvement in theconstruction of the valvedisk of a gate- Valve, whereby the same willmore readily seat itself within the casing, while at the same time beingcapable of easy manipulation.

To this end the invention has particularly in View the formation of thedisk or valve proper of a gate-valve in sections so constructed andrelatively arranged together as to insure a tight uniform seating of thevalve against the oppositely-located valve-seats. In other words, theinvention contemplates a sectional construction of valve-disk, thesections of which will accurately adj ust themselves with reference tothe valve-seats, so as to afford a very tight connection. l

A further object of the invention is to provide new and useful means forguiding the valve-disk, which means shall also serve the function offastening the sections of the valvedisk together.

Another object of the invention is to provide an improved constructionof valve-disk which prevents the water-pressure from wed ging the valveagainst the opposite valve-seat, while at the same time dispensing withthe use of all cams or wedges. 1

With these and other objects in View, which will readilyappear as thenature of the invention is better understood, the same consists in thenovel construction, combination, and arrangement of parts hereinaftermore fully described, illustrated, and claimed.

While the invention is necessarily susceptible to modification, stillthe preferred embodiment thereof is shownin the accompanying drawings,in which- Figure 1 is a vertical sectional view of a gate-valveembodying the improvements contemplated by the present invention. Fig. 2

is a horizontal sectional view on the line 2 2 of Fig. l. Fig. 3 is aVertical sectional view on the line 3 3 of Fig. l, showing the valvepartly raised. Fig. 4 is an inner side elevation of one of thevalve-disk sections. Fig. 5 is a perspective view of the valve-disk,showing the two sections thereof separated,

Referring to the accompanying drawings, l designates the valve-casing,having the usual `inlet and outlet ports and provided between such portswith the upright valve-chamber 2,

the lower portion of which is downwardly convergent and is provided withthe oppositelylocated inclined valve-seat walls 3, provided in theiropposing faces with the annular substantially V-shaped grooves 4, inwhich are fitted the valve-seat rings 5, which forrnthe valve seat facesfor the circular t-apering valve-disk 6, which is arranged to Workvertically within the valve-chamber 2 in the usual manner and to have awedging lit against the oppositely-located inclined valveseats 5.

In the present invention the circular Valvedisk 6 is made in twosections or halves 7 7, which have a matching interlocking connection toform the complete valve or valvedisk. Each valve-disk section 7 isformed of a hollow circular body of a downwardly-tapering outline andwhich is open. at its inner side and closed at its outer side, the outerclosed side of each valve-disk section covering the passage through thevalve-seat against which it ts. The hollow circular body of eachvalve-disk 7 is provided therein with a pair of interior spacing-lugs 8,projecting outwardly from the cavity within the body and a slightdistance beyond the plane of the inner circular edge 9 of the section,said spacing-lugs 8 being provided with rounded ends. The said interioroutwardly-projecting spacing-lugs 8 of each disk-section are designed toaline With and abut against the projecting ends of the correspondinglugs in the other section, whereby when the two sections of the disk arematched the inner circular edges 9 of such disks will be held spacedapart, so that the sections are capableof a rocking movement on the lugs8, so as to adjust themselves with reference to the valve-seats as thevalve-disk is forced to its closed position.

In addition to the interior spacing-lugs 8 each valve-disk section 7 isprovided at its IOO IOS

opposite side edges with forwardly-eXtending ears 10 of a tapering orwedge form and at one side of the plane of such ears with inortiserecesses or notches 11. The ears 10 and the mortises l1 at opposite sideedges of each disk-section are arranged in different horizontal planesor diagonally opposite each other, so that when the two sections of thevalve-disk are matched the forward ly-eXtending tapering ears 10 overlapone above the other and form an interlockingconnection between the twosections of the valve-disk to prevent'relative displacement thereof, itbeing observed that the inortise-reeesses 11 of one disk-section receivetherein the diagonallyopposite ears 10 of the other disk-section inorder to form a flush interlocking joint.

The ears 10 of each disk-section are formed at their outer terminalswith the outturned engaging lips 12, which slidably embrace the verticalguide-ribs 13, formed at opposite inner sides of the uprightvalvechamber 2, within which the valve-disk works. It will be observedthat the engaging lips 12 of the two valve-disk sections respectivelyengage at opposite sides of the guide-ribs 13, so that these guide-ribsnot only serve to guide the valve-disk in its vertical movement, but atthe same time serve to fasten the two sections together by preventingdisplacement in a direction away from each other. The valvedisk sections7 are provided at their upper edges with circular neck portions '14,having formed therein the interior annular groove 15, which receives theflange 16 of the sleevenut 17, in which works thelthreaded stem 1S forraising and lowering the valve. This threaded stem 18 is swiveled at thetop of the valve-casing in the usual way, and b v being turned to theright or left provides for raising and lowering the valve-disk, it beingnoted that the said stem is free to work into the valve-disk between theinterior spacinglugs thereof.

The outer faces of the valve-disk sections have preferably formedtherein the annular grooves 19, in which are fitted the facing plates orrings 20, which form the seatingsurfaces of the valve that lit againstthe valveseats 5.

From the foregoing it is thought that the construction, operation, andmany advantages of the herein-described improvements to the gate-valvewill be readily apparent to those skilled in the art without furtherdescription, and it will be understood that changes in the form,proportion, and the minor details of construction may be resorted towithout departing from the principle or sacrificing any of theadvantages of this invention.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is-

1. In a gate-valve, a valve-disk composed of two separable twinsections, each section being formed of a circular body provided at itsopposite side edges with forwardly-ex tending ears, and at one side ofthe plane of said ears with mortise-recesses to receive the ears of theopposite sections, the opposite forwardly-extending ears of each sectionbeing disalined, substantially as set forth.

2. In a gate-Valve, the casing having a single vertical guide-rib atdiametrically opposite sides thereof, and a valve-disk composed ofseparable twin sections, each having a slidable interlocking engagementwith each of the opposite guide-ribs, substantially as set forth.

3. In a gate-valve, the casing having oppositely-located verticalguide-ribs, and a valvedisk composed of separable twin sections, eachhaving a slidable engagement with the sides of the ribs remote orfarthest therefrom, whereby the ribs serve to guide the valvedisk, andalso fasten the two sections thereof together, substantially as setforth.

4. In a gate-valve, a valve-disk composed of two separable twinsections, each of said sections having rigid abutments projectingoutwardly from the cavity therein and having rounded ends which projecta slight distance beyond the plane of the inner edge of the section, thecontiguous rounded ends of the abutments having a direct contact andpermitting of a relative rocking movement for the sections,substantially as set forth.

5. In a gate-valve, the casing having oppositely-located verticalguide-ribs, and avalvedisk composed of two separable sections providedat their edges with outturned engaging lips respectively engaging atopposite sides of said ribs, whereby the latter serve to guide thevalve-disk and also fasten the two sections thereof together,substantially as set forth.

6. In a gate-valve, the casing having oppositely-located verticalguide-ribs, and a Valvedisk composed of two separable sections, eachvalve-disk section being formed of a circular body provided at itsopposite side edges with forwardly-extending ears terminating inoutturned engaging lips and at one side of the plane of such ears withmortiserecesses t0 receive the ears of the opposite section, saidoutturned engaging lips respectively engaging at opposite sides of saidribs, substantially as set forth.

7. In a gate-valve, the valve-easing having inclined valve-seats, andthe valve-disk coinposed of two separable sections, each valvedisksection having interior-spacing-lugs projecting beyond the inner edge ofthe section and abutting against the corresponding lugs in the othersection, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signatu re in the presence of two Witnesses.

XV ILLIAM EDVARD CRIS'I.

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